<template>
    <a-card :bordered="false">
        <template v-if="this.departId">
            <a-form>
                <a-form-item label='所拥有的权限'>
                    <a-tree
                            checkable
                            @check="onCheck"
                            :checkedKeys="checkedKeys"
                            :treeData="treeData"
                            @expand="onExpand"
                            @select="onTreeNodeSelect"
                            :selectedKeys="selectedKeys"
                            :expandedKeys="expandedKeysss"
                            :checkStrictly="checkStrictly"
                            style="height:500px;overflow: auto;">
            <span slot="hasDatarule" slot-scope="{slotTitle,ruleFlag}">
              {{ slotTitle }}
              <a-icon v-if="ruleFlag" type="align-left" style="margin-left:5px;color: red;"></a-icon>
            </span>
                    </a-tree>
                </a-form-item>
            </a-form>
            <div class="anty-form-btn">
                <a-dropdown style="float: left" :trigger="['click']" placement="topCenter">
                    <a-menu slot="overlay">
                        <!-- 简化Tree逻辑，使用默认checkStrictly为false的行为，即默认父子关联
                        <a-menu-item key="1" @click="switchCheckStrictly(1)">父子关联</a-menu-item>
                        <a-menu-item key="2" @click="switchCheckStrictly(2)">取消关联</a-menu-item>
                        -->
                        <a-menu-item key="3" @click="checkALL">全部勾选</a-menu-item>
                        <a-menu-item key="4" @click="cancelCheckALL">取消全选</a-menu-item>
                        <a-menu-item key="5" @click="expandAll">展开所有</a-menu-item>
                        <a-menu-item key="6" @click="closeAll">合并所有</a-menu-item>
                    </a-menu>
                    <a-button>
                        树操作 <a-icon type="up" />
                    </a-button>
                </a-dropdown>
                <a-button style="float: right" @click="handleSubmit" type="primary" htmlType="button" icon="form">保存</a-button>
            </div>
        </template>
        <a-card v-else :bordered="false" style="height:200px">
            <a-empty>
                <span slot="description"> 请先选择一个部门! </span>
            </a-empty>
        </a-card>
        <depart-datarule-modal ref="datarule"/>
    </a-card>
</template>

<script>
import { queryTreeListForRole, queryDepartPermission, saveDepartPermission } from '@/api/api'
import DepartDataruleModal from './DepartDataruleModal'

export default {
  name: 'DepartAuthModal',
  components: { DepartDataruleModal },
  data() {
    return {
      departId: "",
      treeData: [],
      defaultCheckedKeys: [],
      checkedKeys: [],
      halfCheckedKeys: [],
      expandedKeysss: [],
      allTreeKeys: [],
      autoExpandParent: true,
      checkStrictly: false,
      title: "部门权限配置",
      visible: false,
      loading: false,
      selectedKeys: []
    }
  },
  methods: {
    onTreeNodeSelect(id) {
      if (id && id.length > 0) {
        this.selectedKeys = id
      }
      this.$refs.datarule.show(this.selectedKeys[0], this.departId)
    },
    onCheck (checkedKeys, { halfCheckedKeys }) {
      // 保存选中的和半选中的，后面保存的时候合并提交
      this.checkedKeys = checkedKeys
      this.halfCheckedKeys = halfCheckedKeys
    },
    show(departId) {
      this.departId = departId
      this.loadData();
    },
    close () {
      this.reset()
      this.$emit('close');
      this.visible = false;
    },
    onExpand(expandedKeys) {
      this.expandedKeysss = expandedKeys;
      this.autoExpandParent = false
    },
    reset () {
      this.expandedKeysss = []
      this.checkedKeys = []
      this.defaultCheckedKeys = []
      this.loading = false
    },
    expandAll () {
      this.expandedKeysss = this.allTreeKeys
    },
    closeAll () {
      this.expandedKeysss = []
    },
    checkALL () {
      this.checkedKeys = this.allTreeKeys
    },
    cancelCheckALL () {
      this.checkedKeys = []
    },
    handleCancel () {
      this.close()
    },
    handleSubmit() {
      let that = this;
      if (!that.departId) {
        this.$message.warning('请点击选择一个部门!')
      }
      let checkedKeys = [...that.checkedKeys, ...that.halfCheckedKeys]
      const permissionIds = checkedKeys.join(",")
      let params = {
        departId: that.departId,
        permissionIds,
        lastpermissionIds: that.defaultCheckedKeys.join(",")
      };
      that.loading = true;
      saveDepartPermission(params).then((res) => {
        if (res.success) {
          that.$message.success(res.message);
          that.loading = false;
          that.loadData();
        } else {
          that.$message.error(res.message);
          that.loading = false;
        }
      })
    },
    convertTreeListToKeyLeafPairs(treeList, keyLeafPair = []) {
      for (const { key, isLeaf, children } of treeList) {
        keyLeafPair.push({ key, isLeaf })
        if (children && children.length > 0) {
          this.convertTreeListToKeyLeafPairs(children, keyLeafPair)
        }
      }
      return keyLeafPair;
    },
    emptyCurrForm() {
      this.form.resetFields()
    },
    loadData() {
      queryTreeListForRole().then((res) => {
        this.treeData = res.result.treeList
        this.allTreeKeys = res.result.ids
        const keyLeafPairs = this.convertTreeListToKeyLeafPairs(this.treeData)
        queryDepartPermission({ departId: this.departId }).then((res) => {
          // 过滤出 leaf node 即可，即选中的
          // Tree组件中checkStrictly默认为false的时候，选中子节点，父节点会自动设置选中或半选中
          // 保存 checkedKeys 以及 halfCheckedKeys 以便于未做任何操作时提交表单数据
          const checkedKeys = [...res.result].filter(key => {
            const keyLeafPair = keyLeafPairs.filter(item => item.key === key)[0]
            return keyLeafPair && keyLeafPair.isLeaf
          })
          const halfCheckedKeys = [...res.result].filter(key => {
            const keyLeafPair = keyLeafPairs.filter(item => item.key === key)[0]
            return keyLeafPair && !keyLeafPair.isLeaf
          })
          this.checkedKeys = [...checkedKeys];
          this.halfCheckedKeys = [...halfCheckedKeys]
          this.defaultCheckedKeys = [...halfCheckedKeys, ...checkedKeys];
          this.expandedKeysss = this.allTreeKeys;
        })
      })
    }
  }
}
</script>

<style scoped>

</style>
